Hydraulic control valves

1. Efficient processing of complex inner cavities

Machining Challenges:

The multi-stage runner structure inside the hydraulic valve body is complex, and traditional tools are prone to vibrating knives, resulting in dimensional deviations and surface defects.

 

Solution:

Tool technology: Modular internal cooling milling cutter set (Φ3-Φ20mm), integrated dynamic vibration damping tool holder and 30MPa high-pressure internal cooling system.

Technical parameters: The surface roughness of deep cavity machining reaches Ra0.8μm, and the runner profile accuracy ±0.02mm.

Application case: Excavator main control valve body processing, single piece labor time is shortened by 40%, and the leakage rate is reduced to 0.01mL/min.

 

2. High-precision mating surface processing

Machining Challenges:

The cylindrical degree of the valve spool hole and sealing surface is required to ≤ 0.005mm, and traditional boring is prone to thermal deformation.

 

Solution:

Tool technology: Nano-coated fine boring tool (CBN/PCD material) with low-temperature micro-lubrication system.

Technical parameters: The aperture tolerance control is up to IT6 level, and the processing temperature is stable at 50°C±3°C.

Application case: Hydraulic valve manifold processing of shield machine, the wear life of the mating surface is extended to 100,000 cycles.

 

3. Corrosion-resistant surface reinforcement treatment

Machining Challenges:

The deep-sea/mining environment requires the surface of the valve body to withstand salt spray corrosion for ≥ 2000 hours, and it is difficult to balance finish and corrosion resistance in conventional processing.

 

Solution:

Tool technology: mirror milling tool + post-treatment micro-shot peening process to form a dense surface layer.

Technical parameters: surface roughness Ra0.2μm, salt spray test passed ISO 9227 standard.

Application case: Hydraulic control valve processing on offshore platforms, maintenance period extended from 6 months to 2 years.